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Modbus PLC vs simulator(PC)

6/30/2015 1:34 PM	Rate (0)
SimonZ89 Posts: 5 Rating: (0)	Hi, i have problem as follows: want to simulate a Slave at PC and connect to real s71200 via ethernet cable -modbus tcp ip My PC has 192.168.0.241 and i use the same adres for server ip in MB CLIENT fb block. Pointers etc are set according to siemens manual but server on PC side does not react. I wonder how to get acces to server. Maybe this is a problem with subnet and server app is only visible in PC and not outside?? How can i connect plc as a client to simulator as a slave on PC?? Give me little advise please. Thanks. Regards
SimonZ89 Posts: 5 Rating: (0)
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6/30/2015 2:20 PM	Rate (0)
Bachgeist Advanced Member Joined: 1/27/2015 Last visit: 7/22/2024 Posts: 53 Rating: (9)	Hello SimonZ89, of course both partners have to be in the same subnet (255.255.255.0 in your case). The Modbus Server simulation should listen to port 502 for Modbus telegrams. Do you have some kind of firewall which is maybe blocking? Which simulator you are using for Modbus Server simulation? Regards Bachgeist

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This contribution was helpful to 1 thankful Users SimonZ89

6/30/2015 3:49 PM	Rate (0)
Gwawl Experienced Member Joined: 10/21/2011 Last visit: 7/15/2021 Posts: 57 Rating: (17)	Hi, when you try to connect from the S7-1200 to your PC, does the MB_CLIENT block return an error?

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This contribution was helpful to 1 thankful Users SimonZ89

6/30/2015 6:07 PM	Rate (0)
SimonZ89 Posts: 5 Rating: (0)	connection PC - PLC via ethernet cable done. Problem was with the db block properties. status was 808B so indicated what was wrong. So for now i switched on plc via router to get wireless access but it does not work. Simply my server simulator(PC) can not detect a device to talk to. Strange. Now status is 7002 and client fb block is busy. For sim i use soft from this topic: https://support.industry.siemens.com/tf/ww/en/posts/do-anyone-know-if-there-is-a-good-simulator-to-see-if-there-is-a-good-link-communicationto-the-plc/40698/?page=0&pageSize=10 Generaly only this software detected a plc via cable but not via wireless network. I try to find answer why? And maybe work with pure hardware is easier? thanks
SimonZ89 Posts: 5 Rating: (0)
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7/1/2015 4:42 PM	Rate (0)
SABARISRJ Experienced Member Joined: 12/21/2011 Last visit: 2/12/2025 Posts: 21 Rating: (2)	Hi SimzomZ89, What application you are using at PC side.

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7/2/2015 3:15 AM	Rate (0)
SimonZ89 Posts: 5 Rating: (0)	Hi, this one http://www.plcsimulator.org/
SimonZ89 Posts: 5 Rating: (0)
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